Abstract:

Abstract: Valuing the ecological effects is crucial to the assessment of output of the forestry project. This paper discussed forest function in improving ecological environment. Included water holding ,soil conservation ,CO2 fixation and O2 ,air purification tourism, microclimate improvement and biodiversity increase . The results showed that the land conversion project in Anding city has produced tremendous ecological effects.The ecological value is up to about 327094.32 million yuan (RMB) in total , among which contributed by water resource conservation , soil conservation , CO2 fixation and O2 ,air cleaning , microclimate improvement and biodiversity increase are 35808.36 , 18062.70, 226879.80 ,1582.25 ,5580.81 and 38910.40million yuan (RMB) respectively. The results may be a reference for the assessment of ecological effects of the land conversion project being carried out in the Loess Plateau.